I know '06 cases drop into my '03 chamber fully and without any forcing. Of course, I haven't had the rifle since it was new so whether someone ran an '06 reamer into the chamber is something I can't say. For decades I was operating with the information that an '06 would chamber in an and '03 chamber but not the other way around. I am aware that lots of stuff that appears in print is not correct, so if Boddington has more definitive information I am open to it.
